cgroup: keep zombies associated with their original cgroups

[mirror_ubuntu-zesty-kernel.git] / kernel / events / core.c

diff --git a/kernel/events/core.c b/kernel/events/core.c
index f548f69c4299dd1ee44bfdc1f84d79d655d0d6d7..e9874949c78734d2c662845aedb69d79ccd5b839 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9293,25 +9293,9 @@ static void perf_cgroup_attach(struct cgroup_subsys_state *css,
                task_function_call(task, __perf_cgroup_move, task);
 }
 
-static void perf_cgroup_exit(struct cgroup_subsys_state *css,
-                            struct cgroup_subsys_state *old_css,
-                            struct task_struct *task)
-{
-       /*
-        * cgroup_exit() is called in the copy_process() failure path.
-        * Ignore this case since the task hasn't ran yet, this avoids
-        * trying to poke a half freed task state from generic code.
-        */
-       if (!(task->flags & PF_EXITING))
-               return;
-
-       task_function_call(task, __perf_cgroup_move, task);
-}
-
 struct cgroup_subsys perf_event_cgrp_subsys = {
        .css_alloc      = perf_cgroup_css_alloc,
        .css_free       = perf_cgroup_css_free,
-       .exit           = perf_cgroup_exit,
        .attach         = perf_cgroup_attach,
 };
 #endif /* CONFIG_CGROUP_PERF */